Do you have a lot of network drive/share? No this normal HDD uptight RAID 10 on local machine If thumbnail is large, XnView need to load full image, and resize it, it can't use embedded thumbnail... Okey I understand. but not large (128x96) this same operation in explorer is fastest. Ps. I make to ...

I have this same problem. Slow start but a think the problem is loading view tree I using portable version x64 and if I close tree view is okey open only image (start is normal), but if a navigate after tree loading program is long started. Delete ini, key in regedit noting resolved this problem onl...